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Novarossi REX Head Gasket Shim Set (3)
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This is a replacement -, and is intended for use with the Novarossi R91HR 3D helicopter engine. This set includes one 1 x 0.1mm shim, one 1 x 0.2mm shim, and one 1 x 0.3mm shim.The head shim is the thin circular piece that goes between the head button and the top of the cylinder sleeve and can be used to adjust and fine tune the compression (deck height) of the engine. In general the higher the nitro percentage of the fuel you run, the more head shims you should put in your engine. Please consult the instructions that came with your engine for details about how much your engine should be shimmed!
This product was added to our catalog on July 21, 2010.
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